Study of dislocation model and evolution characteristics of vertical deformation field of gonghe M S=6.9 earthquake |
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| Authors: | Shou-Wen Gong Qing-Liang Wang and Ji-Hua Lin |
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| Institution: | (1) The Second Crustal Deformation Monitoring Center, State Seismological Bureau, 710054 Xi’an, China;(2) Present address: Fujian Province Seismological Bureau, 350003 Fuzhou, China |
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| Abstract: | The preliminary research results of vertical deformation dislocation model of GongheM
S
=6.9 earthquake show that, the causative structure is a hidden fault with strike N60°W, dipping S47°W, which lies near the
current subsidence center of Gonghe basin. The rupture length and width are 30km and 14km, the upper and lower bound depth
of the fault in width direction are 3km and 17km respectively. The maximum coseismic and preseismic vertical deformation of
GongheM
S
=6.9 earthquake are 247mm and about 100mm. The reasons why there existed rapid postseismic uplift are also given a tentative
discussion.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 289–295, 1993. |
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| Keywords: | Gonghe earthquake dislocation model preseismic and coseismic vertical deformation rapid postseismic uplift causal structure |
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